US4507646A - Radio communication system - Google Patents
Radio communication system Download PDFInfo
- Publication number
- US4507646A US4507646A US06/522,377 US52237783A US4507646A US 4507646 A US4507646 A US 4507646A US 52237783 A US52237783 A US 52237783A US 4507646 A US4507646 A US 4507646A
- Authority
- US
- United States
- Prior art keywords
- power
- network
- paging system
- transmitter
- output signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000004891 communication Methods 0.000 title description 4
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 230000007935 neutral effect Effects 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/40—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by components specially adapted for near-field transmission
- H04B5/48—Transceivers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
- H01Q1/46—Electric supply lines or communication lines
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/56—Circuits for coupling, blocking, or by-passing of signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
- H04B5/22—Capacitive coupling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5404—Methods of transmitting or receiving signals via power distribution lines
- H04B2203/5416—Methods of transmitting or receiving signals via power distribution lines by adding signals to the wave form of the power source
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5404—Methods of transmitting or receiving signals via power distribution lines
- H04B2203/5425—Methods of transmitting or receiving signals via power distribution lines improving S/N by matching impedance, noise reduction, gain control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5429—Applications for powerline communications
- H04B2203/5441—Wireless systems or telephone
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5429—Applications for powerline communications
- H04B2203/5445—Local network
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5429—Applications for powerline communications
- H04B2203/545—Audio/video application, e.g. interphone
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5429—Applications for powerline communications
- H04B2203/5458—Monitor sensor; Alarm systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5462—Systems for power line communications
- H04B2203/5483—Systems for power line communications using coupling circuits
Definitions
- the invention relates to a radio communication system, including a method and a device for radio communication in at least one direction.
- the invention is based on a desire for a paging system, which can be used in a limited area with very simple means, especially within a large building, such as an office or a factory building, a hotel, a public building or the like.
- a large building such as an office or a factory building, a hotel, a public building or the like.
- it is a primary object to achieve good cooperation between the antennas of a transmitter a the receiver.
- Another object is to enable the use of an existing electrical network for the power supply of the transmitter or the receiver.
- an existing electrical supply network e.g. a phase wire of an electrical supply system
- the electrical supply network being coupled capacitively, e.g. by means of a capacitor, to the signal connection of the unit.
- the antenna of either the transmitter or the receiver may consist of such an existing wiring.
- a central transmitter is preferably connected to the electrical network, which in this case serves partly as a power source for the electronic and indication equipment of the transmitter, partly as an antenna in that the signal amplifier output of the transmitter is capacitively coupled to a phase or neutral wire.
- the power output is of the magnitude of 50 W, sufficient electromagnetic radiation from the corresponding wire or wires can be obtained in the entire building or the like so that the transmitted radiation can be detected by means of portable, battery powered receiver units provided with ordinary ferrite antennas.
- transmitters can emit radio signals which are detected by an electrical supply network, which serves as a receiver antenna and is capacitively coupled to an alarm center.
- the transmitters as well as the central receiver may in this case be powered either by the network or by batteries.
- FIG. 1 shows a simplified block diagram of a transmitter which is coupled to an electrical network, and a separate receiver;
- FIG. 2 shows an oscillator included in the transmitter
- FIG. 3 shows an amplifier included in the transmitter
- FIG. 4 shows a power unit included in the transmitter.
- FIG. 1 shows a transmitter and the lower part shows a receiver 2.
- the transmitter is coupled to an existing wiring network, namely an ordinary electrical supply system 3 having a group of wires comprising a protective earth 4, a neutral wire 5 and a phase wire 6 of a 220 V alternating voltage.
- the transmitter 1 constitutes the central unit of a paging system and comprises a control device 7 with a microphone 8, a FM-modulator 9, an oscillator 10, an amplifier 11, a power device 12 and a match device 13, the latter being coupled to the amplifier output via a capacitor 14.
- the control device 7 is connected to the remaining transmitter portions 9-14 by means of a 7-wire cable 15, which partly secures the current supply from the power device 12, partly transmits coded information for addressing a receiver 2 paging device, which information is transmitted via the devices 9-13 to be described further below.
- the control device is provided with the following means (not shown): an on-off switch, a set of keys for dialling a five-digit code number e.g.
- a display for indicating the dialled code numer, a transmitter key for emitting the coded information via the devices 9-13, a red light emitting diode or the like for indicating that such information transmission is being performed, a green light emitting diode or the like for indicating that transmission of speech is possible, and the microphone 8.
- the oscillator comprises a s.c. synthesis oscillator consisting of a voltage controlled oscillator 16 (VCO), a crystal controlled reference oscillator 17, a variable frequency divider 18 connected to the output of the VCO oscillator 16, and a phase comparator 19 connected to the frequency divider 18 and the reference oscillator 17, these components forming a phaselocked loop.
- VCO voltage controlled oscillator
- a crystal controlled reference oscillator 17 connected to the output of the VCO oscillator 16
- a phase comparator 19 connected to the frequency divider 18 and the reference oscillator 17, these components forming a phaselocked loop.
- the setting of a desired frequency is effected in the frequency divider 18.
- a frequency modulated radio frequency signal is obtained, preferably having a carrier wave frequency of about 100 kHz and a modulation of about ⁇ 3 kHz.
- a carrier wave frequency within the region 20-500 kHz can be used.
- the FM-modulated signal is transferred to the amplifier 11, which is illustrated schematically in FIG. 3. It consists of a power stage without transformer and of the push-pull type, working in class AB.
- the amplifier portion 19 is fed back via a band pass filter 20 tuned to the transmitter frequency. This filter limits harmonics and other non-desired signals.
- the amplifier output is connected to the capacitor 14 which is dimensioned to withstand rather high voltages and currents, e.g. having a capacitance of about 1 ⁇ F and designed to withstand 600 V and 5 A.
- a match device 13 having variable impedance is inserted between the capacitor 14 and the electrical network connection 21, so that the load impedance can be adjusted to the impedance of the amplifier 11, and an optimal energy transfer is ensured.
- FIG. 4 shows a circuit diagram of the power device 12 of the transmitter.
- the signal output of the chain 9-13 is connected (capacitively via the capacitor 14) to a phase wire, supplied with 220 V alterating voltage, by means of an ordinary plug which is connected to a protectively earthed electrical socket.
- the drive power of the transmitter is provided.
- the drive unit comprises for this purpose two separate transformers 22,23 and associated rectifiers 24,25 and capacitor filters 26,27.
- the upper power supply shown in FIG. 4 is connected, via a conduit 28--28, to the above mentioned on-off switch in the control device 7 and, via said switch, to a relay coil Re 1 in the lower power supply.
- the arrangement is such that a transistor Tr1, which is connected in series with the relay coil Re1, will conduct only if the plug is turned correctly, i.e. if the conduit F connected to the base of the transistor is coupled to the phase wire of the electrical network. Should the conduit F be coupled to the neutral wire instead, the transistor Tr1 remains non-conductive, which in turn results in that a relay switch Re1 in the upper power supply remains open. Both power supplies are mutually coupled also in that a relay coil Re2 in the upper supply controls a relay switch Re 2 in the other supply.
- the upper power supply gives a stabilized d.c. voltage of 12 V to the control device 7, the modulator 9 and the oscillator 10, whereas the lower power supply supplies the power amplifier 11 with an unstabilized d.c. voltage of 40 V. If, on the other hand, no protective earth is available, or the plug is turned incorrectly, the power device 12 will not give any voltage at all.
- the radio frequency signal is transmitted via the connection (plug-socket) 21 to the phase wire 6 included in the electrical network, the phase wire being presumed to extend all around the building into its various parts. If certain groups are connected to the other two phases, a capacitive transfer coupling can be made so as to enable the signals to be distributed to the entire electrical network in the building.
- the phase conductor 6 or conductors will hereby serve as an antenna and will radiate radio waves of the particular frequency of about 100 kHz, i.e. a relatively long wave radiation.
- Each receiver 2 comprises a ferrite antenna 29 tuned to the working frequency, a FM-receiver 30 connected to the antenna, and, in two branches in parallel to each other, a decoder 31 for detecting the transmitted digit code (e.g. a CCIR-code), possibly with an associated display 32, and a low frequency amplifier 33 having a loud-speaker 34 for speech transmission.
- the receiver 2 comprises buttons or keys (not shown) for switching the units 30,31,33 on and off as well as switching over between visual indication on the display 32 and acoustic speech transmission via the loud-speaker 34.
- the receivers 2 are battery powered, the batteries being preferably chargeable via the electrical network when the receivers are not in use as paging units, e.g. at night.
- the conduit network can consist of any electrical supply network.
- a transmitter or a receiver, or an apparatus serving alteratively as transmitter and receiver can be capacitively coupled to the wiring network functioning as an antenna.
- the signal modulation can be performed as desired, e.g. by frequency, phase, amplitude or frequency shift modulation.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Transmitters (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Circuits Of Receivers In General (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8106805A SE428338B (sv) | 1981-11-16 | 1981-11-16 | Anordning for radiokommunikation i atminstone en riktning inom en storre byggnad eller liknande |
SE8106805 | 1981-11-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
US4507646A true US4507646A (en) | 1985-03-26 |
Family
ID=20345045
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/522,377 Expired - Fee Related US4507646A (en) | 1981-11-16 | 1982-11-12 | Radio communication system |
Country Status (9)
Country | Link |
---|---|
US (1) | US4507646A (sv) |
EP (1) | EP0093762A1 (sv) |
JP (1) | JPS58501979A (sv) |
AU (2) | AU1552782A (sv) |
DK (1) | DK318883A (sv) |
FI (1) | FI832573A0 (sv) |
NO (1) | NO832562L (sv) |
SE (1) | SE428338B (sv) |
WO (1) | WO1983001877A1 (sv) |
Cited By (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4633125A (en) * | 1985-05-09 | 1986-12-30 | Board Of Trustees Operating Michigan State University | Vented 360 degree rotatable vessel for containing liquids |
WO1987001252A1 (en) * | 1985-08-12 | 1987-02-26 | Sound Sender, Inc. | Adapter for car radio |
US4712250A (en) * | 1985-08-12 | 1987-12-08 | Sound Sender, Inc. | Tape player adapter for car radio |
US4888495A (en) * | 1986-06-20 | 1989-12-19 | Manufacture D'appareillage Electrique Cahors | Power adapter for electrical installations and especially domestic installations with so-called carrier current control |
US4912553A (en) * | 1986-03-28 | 1990-03-27 | Pal Theodore L | Wideband video system for single power line communications |
US5151838A (en) * | 1989-09-20 | 1992-09-29 | Dockery Gregory A | Video multiplying system |
US5327230A (en) * | 1989-09-20 | 1994-07-05 | Dockery Gregory A | Video multiplying system |
US5351284A (en) * | 1992-01-21 | 1994-09-27 | Dynascan Corporation | Antenna for a base unit of a cordless telephone system |
US5983076A (en) * | 1996-08-29 | 1999-11-09 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Antenna unit for communication system for movable body |
EP0980156A2 (en) * | 1998-07-15 | 2000-02-16 | Norweb Plc | Radio broadcasting system comprising an antenna system, which is constituted by at least a portion of the above-ground component of an electricity distribution network |
US6104920A (en) * | 1998-03-26 | 2000-08-15 | Nortel Networks Corporation | Radio communication device antenna arrangements |
NL1013709C2 (nl) * | 1999-12-01 | 2001-06-05 | Ericsson Telefon Ab L M | Telecommunicatiesysteem. |
US6243571B1 (en) * | 1998-09-21 | 2001-06-05 | Phonex Corporation | Method and system for distribution of wireless signals for increased wireless coverage using power lines |
EP1232568A1 (en) * | 1999-11-15 | 2002-08-21 | Interlogix, Inc. | Highly reliable power line communications system |
WO2002097230A1 (fr) | 2001-06-01 | 2002-12-05 | Somfy | Dispositif d'entrainement a commande par radiofrequence |
US6493546B2 (en) | 1999-03-05 | 2002-12-10 | Xm Satellite Radio Inc. | System for providing signals from an auxiliary audio source to a radio receiver using a wireless link |
US20050059360A1 (en) * | 2003-09-16 | 2005-03-17 | Andrew Corporation, A Delaware Corporation | Compensation of filters in radio transmitters |
US20050164666A1 (en) * | 2002-10-02 | 2005-07-28 | Lang Jack A. | Communication methods and apparatus |
DE102004057515A1 (de) * | 2004-11-29 | 2006-06-01 | Tridonicatco Gmbh & Co. Kg | Lampenbetriebsgerät mit Schnittstelleneinheit zum drahtlosen Empfangen externer Steuersignale |
US20070183133A1 (en) * | 2004-04-15 | 2007-08-09 | Koninklijke Philips Electronics, N.V. | Mains wire antenna for wireless interface applications |
US20080266834A1 (en) * | 2004-04-15 | 2008-10-30 | Koninklijke Philips Electronics, N.V. | Antenna Through the Use of Lamp Electrodes |
EP2109226A2 (fr) | 2008-04-10 | 2009-10-14 | Somfy SAS | Dispositif de type émetteur et/ou récepteur de signaux radioélectriques. |
EP2309826A1 (de) * | 2009-09-26 | 2011-04-13 | WTS Kereskedelmi és Szolgáltató Kft. | Beleuchtungseinrichtung |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63114333A (ja) * | 1986-10-31 | 1988-05-19 | Nec Home Electronics Ltd | 無線バスシステム |
AU6508594A (en) * | 1993-04-15 | 1994-11-08 | Howard Charles Stapleton | Data transmission using capacitive coupling |
DE102019123021A1 (de) * | 2019-08-28 | 2021-03-04 | Zumtobel Lighting Gmbh | Leuchte oder Versorgungseinheit für Leuchten mit Kommunikationsmodul |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE612552C (de) * | 1932-02-13 | 1935-04-27 | Fried Krupp Grusonwerk Akt Ges | Vorrichtung zur Destillation von fluechtigen Metallen |
US2922598A (en) * | 1954-06-11 | 1960-01-26 | American Enka Corp | Thread tensioning device |
US2925598A (en) * | 1954-07-16 | 1960-02-16 | Ralph R Williams | Antenna network employing a variable capacitance |
US3603881A (en) * | 1968-03-01 | 1971-09-07 | Del Mar Eng Lab | Frequency shift telemetry system with both radio and wire transmission paths |
DE2444041A1 (de) * | 1974-09-14 | 1976-03-25 | Braun Ag | Kw- und ukw-antenne fuer rundfunkempfangsgeraete mit skalen- und geraetebeleuchtung |
US3978469A (en) * | 1971-06-07 | 1976-08-31 | Schaad Howard A | Method and apparatus for communicating in building structures and parts thereof particularly multi-story building |
US3993989A (en) * | 1975-05-19 | 1976-11-23 | Trw Inc. | ELF communications system using HVDC transmission line as antenna |
US4097801A (en) * | 1976-04-01 | 1978-06-27 | Canadian General Electric Company Limited | Cross-correlator circuit |
US4097808A (en) * | 1976-04-02 | 1978-06-27 | Marine Electric Corporation | Entertainment system and method |
GB1538623A (en) * | 1976-11-09 | 1979-01-24 | Toyota Motor Co Ltd | Hf choke coil arrangements |
US4409590A (en) * | 1981-09-28 | 1983-10-11 | General Electric Company | Building security, communication and control system |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3657715A (en) * | 1970-04-13 | 1972-04-18 | William J Curtin | Ultrasonic paging system |
CH612552A5 (en) * | 1977-04-29 | 1979-07-31 | Autophon Ag | Method for forming induction loops and its application in paging systems |
-
1981
- 1981-11-16 SE SE8106805A patent/SE428338B/sv unknown
-
1982
- 1982-11-12 US US06/522,377 patent/US4507646A/en not_active Expired - Fee Related
- 1982-11-12 AU AU1552782A patent/AU1552782A/xx active Pending
- 1982-11-12 AU AU15527/83A patent/AU1552783A/en not_active Abandoned
- 1982-11-12 JP JP57503453A patent/JPS58501979A/ja active Pending
- 1982-11-12 EP EP82903485A patent/EP0093762A1/en not_active Ceased
- 1982-11-12 WO PCT/SE1982/000384 patent/WO1983001877A1/en not_active Application Discontinuation
-
1983
- 1983-07-11 DK DK318883A patent/DK318883A/da not_active Application Discontinuation
- 1983-07-14 FI FI832573A patent/FI832573A0/fi not_active Application Discontinuation
- 1983-07-14 NO NO832562A patent/NO832562L/no unknown
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE612552C (de) * | 1932-02-13 | 1935-04-27 | Fried Krupp Grusonwerk Akt Ges | Vorrichtung zur Destillation von fluechtigen Metallen |
US2922598A (en) * | 1954-06-11 | 1960-01-26 | American Enka Corp | Thread tensioning device |
US2925598A (en) * | 1954-07-16 | 1960-02-16 | Ralph R Williams | Antenna network employing a variable capacitance |
US3603881A (en) * | 1968-03-01 | 1971-09-07 | Del Mar Eng Lab | Frequency shift telemetry system with both radio and wire transmission paths |
US3978469A (en) * | 1971-06-07 | 1976-08-31 | Schaad Howard A | Method and apparatus for communicating in building structures and parts thereof particularly multi-story building |
DE2444041A1 (de) * | 1974-09-14 | 1976-03-25 | Braun Ag | Kw- und ukw-antenne fuer rundfunkempfangsgeraete mit skalen- und geraetebeleuchtung |
US3993989A (en) * | 1975-05-19 | 1976-11-23 | Trw Inc. | ELF communications system using HVDC transmission line as antenna |
US4097801A (en) * | 1976-04-01 | 1978-06-27 | Canadian General Electric Company Limited | Cross-correlator circuit |
US4097808A (en) * | 1976-04-02 | 1978-06-27 | Marine Electric Corporation | Entertainment system and method |
GB1538623A (en) * | 1976-11-09 | 1979-01-24 | Toyota Motor Co Ltd | Hf choke coil arrangements |
US4409590A (en) * | 1981-09-28 | 1983-10-11 | General Electric Company | Building security, communication and control system |
Cited By (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4633125A (en) * | 1985-05-09 | 1986-12-30 | Board Of Trustees Operating Michigan State University | Vented 360 degree rotatable vessel for containing liquids |
WO1987001252A1 (en) * | 1985-08-12 | 1987-02-26 | Sound Sender, Inc. | Adapter for car radio |
US4712250A (en) * | 1985-08-12 | 1987-12-08 | Sound Sender, Inc. | Tape player adapter for car radio |
US4912553A (en) * | 1986-03-28 | 1990-03-27 | Pal Theodore L | Wideband video system for single power line communications |
US4888495A (en) * | 1986-06-20 | 1989-12-19 | Manufacture D'appareillage Electrique Cahors | Power adapter for electrical installations and especially domestic installations with so-called carrier current control |
US5327230A (en) * | 1989-09-20 | 1994-07-05 | Dockery Gregory A | Video multiplying system |
US5151838A (en) * | 1989-09-20 | 1992-09-29 | Dockery Gregory A | Video multiplying system |
US5351284A (en) * | 1992-01-21 | 1994-09-27 | Dynascan Corporation | Antenna for a base unit of a cordless telephone system |
US5983076A (en) * | 1996-08-29 | 1999-11-09 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Antenna unit for communication system for movable body |
US6104920A (en) * | 1998-03-26 | 2000-08-15 | Nortel Networks Corporation | Radio communication device antenna arrangements |
EP0980156A3 (en) * | 1998-07-15 | 2001-12-05 | Norweb Plc | Radio broadcasting system comprising an antenna system, which is constituted by at least a portion of the above-ground component of an electricity distribution network |
EP0980156A2 (en) * | 1998-07-15 | 2000-02-16 | Norweb Plc | Radio broadcasting system comprising an antenna system, which is constituted by at least a portion of the above-ground component of an electricity distribution network |
US6243571B1 (en) * | 1998-09-21 | 2001-06-05 | Phonex Corporation | Method and system for distribution of wireless signals for increased wireless coverage using power lines |
US6810233B2 (en) | 1999-03-05 | 2004-10-26 | Xm Satellite Radio Inc. | System for providing signals from an auxiliary audio source to a radio receiver using a wireless link |
US6493546B2 (en) | 1999-03-05 | 2002-12-10 | Xm Satellite Radio Inc. | System for providing signals from an auxiliary audio source to a radio receiver using a wireless link |
EP1232568A1 (en) * | 1999-11-15 | 2002-08-21 | Interlogix, Inc. | Highly reliable power line communications system |
EP1232568A4 (en) * | 1999-11-15 | 2005-04-27 | Interlogix Inc | HIGHLY RELIABLE COMMUNICATION SYSTEM OVER POWER SUPPLY LINES |
NL1013709C2 (nl) * | 1999-12-01 | 2001-06-05 | Ericsson Telefon Ab L M | Telecommunicatiesysteem. |
WO2001041325A3 (en) * | 1999-12-01 | 2001-11-08 | Ericsson Telefon Ab L M | Telecommunication system |
WO2001041325A2 (en) * | 1999-12-01 | 2001-06-07 | Telefonaktiebolaget Lm Ericsson (Publ) | Telecommunication system |
US20040162040A1 (en) * | 2001-06-01 | 2004-08-19 | Michel Ramus | Device for radio-frequency controlled drive |
WO2002097230A1 (fr) | 2001-06-01 | 2002-12-05 | Somfy | Dispositif d'entrainement a commande par radiofrequence |
US7151464B2 (en) | 2001-06-01 | 2006-12-19 | Somfy | Drive device with radio frequency control |
EP2345789A1 (fr) | 2001-06-01 | 2011-07-20 | Somfy | Dispositif d'entrainement à commande par radiofréquence |
US20050164666A1 (en) * | 2002-10-02 | 2005-07-28 | Lang Jack A. | Communication methods and apparatus |
US20050059360A1 (en) * | 2003-09-16 | 2005-03-17 | Andrew Corporation, A Delaware Corporation | Compensation of filters in radio transmitters |
US7714699B2 (en) * | 2004-04-15 | 2010-05-11 | Koninklijke Philips Electronics N.V. | Antenna through the use of lamp electrodes |
US20070183133A1 (en) * | 2004-04-15 | 2007-08-09 | Koninklijke Philips Electronics, N.V. | Mains wire antenna for wireless interface applications |
US20080266834A1 (en) * | 2004-04-15 | 2008-10-30 | Koninklijke Philips Electronics, N.V. | Antenna Through the Use of Lamp Electrodes |
DE102004057515A1 (de) * | 2004-11-29 | 2006-06-01 | Tridonicatco Gmbh & Co. Kg | Lampenbetriebsgerät mit Schnittstelleneinheit zum drahtlosen Empfangen externer Steuersignale |
DE102004057515B4 (de) * | 2004-11-29 | 2017-10-12 | Tridonic Gmbh & Co Kg | Lampenbetriebsgerät mit Schnittstelleneinheit zum drahtlosen Empfangen externer Steuersignale |
US20090258606A1 (en) * | 2008-04-10 | 2009-10-15 | Michel Ramus | Device of radioelectric signals transmitter and/or receiver type |
EP2109226A2 (fr) | 2008-04-10 | 2009-10-14 | Somfy SAS | Dispositif de type émetteur et/ou récepteur de signaux radioélectriques. |
US8044630B2 (en) | 2008-04-10 | 2011-10-25 | Somfy Sas | Device of radioelectric signals transmitter and/or receiver type |
EP2309826A1 (de) * | 2009-09-26 | 2011-04-13 | WTS Kereskedelmi és Szolgáltató Kft. | Beleuchtungseinrichtung |
Also Published As
Publication number | Publication date |
---|---|
SE8106805L (sv) | 1983-05-17 |
FI832573A (fi) | 1983-07-14 |
NO832562L (no) | 1983-07-14 |
SE428338B (sv) | 1983-06-20 |
DK318883D0 (da) | 1983-07-11 |
JPS58501979A (ja) | 1983-11-17 |
EP0093762A1 (en) | 1983-11-16 |
DK318883A (da) | 1983-07-11 |
FI832573A0 (fi) | 1983-07-14 |
WO1983001877A1 (en) | 1983-05-26 |
AU1552783A (en) | 1983-06-01 |
AU1552782A (en) | 1983-06-01 |
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